6392405645 has 12 divisors (see below), whose sum is σ = 7747649940. Its totient is φ = 5063251200.

The previous prime is 6392405609. The next prime is 6392405647. The reversal of 6392405645 is 5465042936.

It can be written as a sum of positive squares in 6 ways, for example, as 2799362281 + 3593043364 = 52909^2 + 59942^2 .

It is not a de Polignac number, because 6392405645 - 2¹² = 6392401549 is a prime.

It is a super-3 number, since 3×6392405645³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6392405596 and 6392405605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6392405647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11660 + ... + 113669.

It is an arithmetic number, because the mean of its divisors is an integer number (645637495).

Almost surely, 2^6392405645 is an apocalyptic number.

It is an amenable number.

6392405645 is a deficient number, since it is larger than the sum of its proper divisors (1355244295).

6392405645 is a wasteful number, since it uses less digits than its factorization.

6392405645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125536 (or 125435 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The square root of 6392405645 is about 79952.5211922676. The cubic root of 6392405645 is about 1855.9008704185.

The spelling of 6392405645 in words is "six billion, three hundred ninety-two million, four hundred five thousand, six hundred forty-five".